Made of polypropylene and polycarbonate. Autoclavable, desicators can hold vacuum upto
740 mm of Hg for 24 hrs. An internal groove is provided on the flange to hold a silicon rubber
O-ring. Polypropylene stopcock with fitted with a self lubricating PTFE plug. This plug works three
way i.e. vacuum creation, shutting off and vacuum releasing.
